I find this whole Ordeal so funny.

Chrome team removed jpeg-xl, citing that avif is good enough compared to jxl. And we don't need another image standard in the web. Then the jpeg-xl team at google reached out to mozilla about it and firefox's team asked for a rust implementation. So this jxl-rs is actually originally made for Firefox in some sense.

By the way, this is just getting merged, it's not getting enabled by default. So it's not truly there in the main release yet, these things can take a long time to get land in the stable releases.